If you mean the interior trim in the rear, I bought new pieces and had them painted and installed. I'm keeping the originals in case I want to go back or for next owner since the GT4 is a relatively rare Porsche. Am really happy with the way it turned out and to have the brushed aluminum look gone.
Now, it that's not what you were looking for, let me know . . .

Just saw your post from a several weeks ago about the new trim pieces you added to the back-end of the GT4. Did you fabricate those yourself, or did you create that look yourself? Looking for a similar look and didn't see a link to a product. Thanks!